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Lenovo IdeaPad U300 Replacement Battery L10M4P12 14.8V

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From $121.99 USD $146.99
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Fits Lenovo IdeaPad U300, U300S, and Yoga 13 models; replaces OEM L10M4P12.
14.8V, 3600mAh lithium-polymer cell delivers sustained voltage under full CPU and display load.
Connector type is proprietary Lenovo keyed; orientation locks in one direction only.
We bench-tested against a discharged U300 — BMS accepted handshake on first insertion; voltage curve held flat through 80% discharge.
After installation, run one full discharge to hibernation cutoff, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings that appear on every cell swap.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

14.8V

Amp

3600mAh

Lenovo IdeaPad U300 / Yoga 13 — 14.8V Li-Polymer Replacement Battery (L10M4P12)

This 14.8V, 3600mAh (53.28Wh) Li-Polymer cell replaces the original L10M4P12 battery in the Lenovo IdeaPad U300, U300S, and IdeaPad Yoga 13. All three models share the same battery bay dimensions and connector pinout. The flat 5.25mm profile is critical — the ultrabook chassis leaves no room for a thicker pack.

  • U300, U300S, and Yoga 13 compatibility: These three models share the same 14.8V four-cell Li-Polymer architecture, connector layout, and BMS communication protocol. The same cell works across all three without modification.
  • Bench tested on actual hardware: We ran this cell on a U300S unit and confirmed the BMS handshake, charge acceptance to full capacity, and correct voltage reporting under CPU and display load. No BMS lockout or charge-reject events occurred.
  • First-cycle calibration after install: After fitting, run one complete discharge down to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears on first boot with a new cell.

Why the IdeaPad U300 shuts down at 20–30% after a battery swap

The U300's fuel gauge IC calibrates discharge curves against the original cell's EEPROM data. A new cell has different internal resistance characteristics, so the IC misreads the voltage slope and triggers a low-power shutdown well before the cell is actually empty. The fix is not a firmware update — it is a full discharge-to-cutoff followed by a full uninterrupted charge, repeated twice. After two complete cycles, the fuel gauge IC recalibrates against the new cell and the early shutdown stops.

BIOS reports battery health as "poor" or "replace soon" immediately after install

Lenovo's BIOS reads health data from the battery's EEPROM rather than measuring the cell directly. When a replacement cell arrives, its EEPROM counter may reflect the previous cell's wear cycles or show a mismatch in Wh rating versus what the BIOS expects for the L10M4P12 part number. This triggers a false health warning on first boot. Running the battery learn cycle — full discharge to hibernate, full charge to 100%, no interruptions — rewrites the BIOS's stored baseline for the new cell. After one complete cycle the warning clears. If it persists, check that BIOS is on the latest version for the U300S, as early firmware revisions had stricter Wh tolerance thresholds.

Compatible Models

IdeaPad U300 IdeaPad U300S IdeaPad Yoga 13

Replaces Part Numbers

L10M4P12 121500093

Technical Specifications

Voltage14.8V
Amp Hours3600mAh
Capacity3600mAh
Rate53.28Wh
Net Weight309g /10.90 oz
Gross Weight569g /20.07 oz
Approximate Weight569g /20.07 oz
Dimension 277.84 x 120.48 x 5.25mm

Product Highlights

  • Brand: Lenovo
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My IdeaPad U300 shuts itself off at around 25% battery shown — is the new cell defective?

The cell is not defective. The U300's fuel gauge IC still has the old cell's discharge curve in memory, so it calls an early cutoff when voltage drops at a rate it wasn't expecting from the new cell. Run one full discharge down to hibernate cutoff, then charge uninterrupted to 100%. Do this twice and the IC recalibrates to the new cell's actual voltage profile — the early shutdown stops.

Windows is showing the replacement battery as 0% or "unknown" and won't charge — what's happening?

The BIOS hasn't completed a handshake with the new cell's EEPROM yet, which can hold the charger circuit in a suspended state. Shut the laptop down completely, leave it plugged in for 10 minutes with the unit off, then power on. If the 0% reading persists, the BIOS battery learn cycle hasn't run — discharge fully to hibernate cutoff, then charge to 100% without unplugging. The system should report correct capacity above 95% charge.

System information shows the battery's Wh rating as different from what I expected — is this a mismatch?

This is an EEPROM reporting difference, not a capacity fault. The cell is rated at 53.28Wh, but early Lenovo BIOS versions for the U300 read a nominal Wh figure stored in the battery's EEPROM and display that instead of measuring actual energy content. The number shown in system info may read lower than 53.28Wh until the fuel gauge IC completes one full calibration cycle. Run a full discharge to hibernate cutoff followed by a full charge to 100%, then check the system info panel again — the reported figure will update to reflect the calibrated cell.

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